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IPO: Consider support for each language separately

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We only define `INTERPROCEDURAL_OPTIMIZATION` behavior for C, CXX, and
Fortran languages.  Do not try to enable support for other languages.
Furthermore, each language builds with a different compiler, so check
for support by CMake and the compiler for each language independently.

Fixes: #16944
This commit is contained in:
Brad King
2017-06-14 10:12:48 -04:00
parent d025faf436
commit ba247ccaba
22 changed files with 62 additions and 52 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
Modules/CheckIPOSupported.cmake
View File

@@ -207,15 +207,17 @@ function(check_ipo_supported)
endif()
endif()
if(NOT _CMAKE_IPO_SUPPORTED_BY_CMAKE)
_ipo_not_supported("CMake doesn't support IPO for current compiler")
return()
endif()
foreach(lang ${languages})
if(NOT _CMAKE_${lang}_IPO_SUPPORTED_BY_CMAKE)
_ipo_not_supported("CMake doesn't support IPO for current ${lang} compiler")
return()
endif()
if(NOT _CMAKE_IPO_MAY_BE_SUPPORTED_BY_COMPILER)
_ipo_not_supported("Compiler doesn't support IPO")
return()
endif()
if(NOT _CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER)
_ipo_not_supported("${lang} compiler doesn't support IPO")
return()
endif()
endforeach()
if(CMAKE_GENERATOR MATCHES "^Visual Studio ")
_ipo_not_supported("CMake doesn't support IPO for current generator")

4
Modules/Compiler/Clang.cmake
View File

@@ -30,8 +30,8 @@ else()
set(CMAKE_${lang}_COMPILE_OPTIONS_EXTERNAL_TOOLCHAIN "--gcc-toolchain=")
endif()
set(_CMAKE_IPO_SUPPORTED_BY_CMAKE YES)
set(_CMAKE_IPO_MAY_BE_SUPPORTED_BY_COMPILER YES)
set(_CMAKE_${lang}_IPO_SUPPORTED_BY_CMAKE YES)
set(_CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER YES)
string(COMPARE EQUAL "${CMAKE_${lang}_COMPILER_ID}" "AppleClang" __is_apple_clang)

6
Modules/Compiler/GNU.cmake
View File

@@ -48,14 +48,14 @@ macro(__compiler_gnu lang)
set(CMAKE_INCLUDE_SYSTEM_FLAG_${lang} "-isystem ")
endif()
set(_CMAKE_IPO_SUPPORTED_BY_CMAKE YES)
set(_CMAKE_IPO_MAY_BE_SUPPORTED_BY_COMPILER NO)
set(_CMAKE_${lang}_IPO_SUPPORTED_BY_CMAKE YES)
set(_CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER NO)
# '-flto' introduced since GCC 4.5:
# * https://gcc.gnu.org/onlinedocs/gcc-4.4.7/gcc/Option-Summary.html (no)
# * https://gcc.gnu.org/onlinedocs/gcc-4.5.4/gcc/Option-Summary.html (yes)
if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 4.5)
set(_CMAKE_IPO_MAY_BE_SUPPORTED_BY_COMPILER YES)
set(_CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER YES)
set(__lto_flags -flto)
if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 4.7)

4
Modules/Compiler/QCC.cmake
View File

@@ -13,8 +13,8 @@ macro(__compiler_qcc lang)
set(CMAKE_INCLUDE_SYSTEM_FLAG_${lang} "-Wp,-isystem,")
set(CMAKE_DEPFILE_FLAGS_${lang} "-Wc,-MD,<DEPFILE>,-MT,<OBJECT>,-MF,<DEPFILE>")
set(_CMAKE_IPO_SUPPORTED_BY_CMAKE NO)
set(_CMAKE_IPO_MAY_BE_SUPPORTED_BY_COMPILER NO)
set(_CMAKE_${lang}_IPO_SUPPORTED_BY_CMAKE NO)
set(_CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER NO)
unset(CMAKE_${lang}_COMPILE_OPTIONS_IPO)
unset(CMAKE_${lang}_ARCHIVE_CREATE_IPO)

8
Modules/Platform/Linux-Intel.cmake
View File

@@ -30,7 +30,7 @@ macro(__linux_compiler_intel lang)
# executables that use dlopen but do not set ENABLE_EXPORTS.
set(CMAKE_SHARED_LIBRARY_LINK_${lang}_FLAGS "-rdynamic")
set(_CMAKE_IPO_SUPPORTED_BY_CMAKE YES)
set(_CMAKE_${lang}_IPO_SUPPORTED_BY_CMAKE YES)
if(XIAR)
# INTERPROCEDURAL_OPTIMIZATION
@@ -38,10 +38,10 @@ macro(__linux_compiler_intel lang)
set(CMAKE_${lang}_CREATE_STATIC_LIBRARY_IPO
"${XIAR} cr <TARGET> <LINK_FLAGS> <OBJECTS> "
"${XIAR} -s <TARGET> ")
set(_CMAKE_IPO_MAY_BE_SUPPORTED_BY_COMPILER YES)
set(_CMAKE_IPO_LEGACY_BEHAVIOR YES)
set(_CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER YES)
set(_CMAKE_${lang}_IPO_LEGACY_BEHAVIOR YES)
else()
set(_CMAKE_IPO_MAY_BE_SUPPORTED_BY_COMPILER NO)
set(_CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER NO)
endif()
if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 12.0)